The following bug occurred "sometimes" in "some environments": dialog popups suddenly resized during usage - and they resized to their minimum height (according to their content).
Now our today's community hero ROLAND HEINRICH (Greenfield Solutions) could reproduce the bug, so that I could observe - with the strange issue: there were no problems on his left screen while the problem occurred on the right screen...!
The reason for the bug is a quite stupid one. Sometimes the pixel position of a dialog is communicated from the browser as float value "255,0000011" instead of "255". On server side the incorrect parsing of an integer value lease to a return value of "-1", which then is the signal to trigger a resizing to the minimum....
Uuuuh. So this issue is solved now. The solution is part of next update. If you required some interim update, please let me know.